Download PTU (Punjab Technical University) B.Tech (Bachelor of Technology) / BE (Bachelor of Engineering) 2021 January BT-Biotechnology 3rd Sem 76945 Biostatistics Previous Question Paper
Total No. of Pages : 02
Total No. of Questions : 18
B.Tech. (BT) (2018 Batch) (Sem.?3)
BIOSTATISTICS
Subject Code : BTBT301-18
M.Code : 76945
Time : 3 Hrs. Max. Marks : 60
INST RUCT IONS T O CANDIDAT ES :
1 .
SECT ION-A is COMPULSORY cons is ting of TEN questions carrying TWO marks
each.
2 .
SECT ION-B c ontains F IVE questions c arrying FIVE marks eac h and s tud ents
have to atte mpt any FOUR q ues tions.
3 .
SECT ION-C contains THREE questions carrying T EN marks e ach and s tudents
have to atte mpt any T WO questio ns.
SECTION-A
Answer briefly :
1.
What is ratio scale data?
2.
Differentiate between population and sample.
3.
Define median.
4.
What is coefficient of variation?
5.
8P5 = __________.
6.
Define kurtosis of a distribution.
7.
Differentiate between one-tailed and two-tailed statistical hypothesis testing.
8.
What is Fisher exact test?
9.
What is Kruskal-Wallis test?
10. What is difference between negative, positive and zero correlation?
1 | M-76945
(S2)- 316
SECTION-B
11. Differentiate between frequency distribution and cumulative frequency distribution? How
will you graphically represent them?
12. Determine the arithmetic mean and mode of the following data : 7, 13, 9, 12, 8, 8, 7, 8,
13, 6, 10, 8, 8, 12, 9, 12, 8, 12, 11, 12.
Also write the importance of these two measures of central tendencies.
13. What is the probability of selecting at random a card of diamond or a king from a well-
shuffled deck of playing cards?
14. If in a binomial population, p = 0.22 and n = 5, what is the probability of X = 4?
15. Perform paired sample t-test to test the null hypothesis that the left foreleg and left
hindleg of deer are equal. The data consisting of left hindleg and left foreleg lengths (cm)
are as follows :
Deer
1
2
3
4
5
6
7
8
9
10
Hindleg Length
142
140
144
144
142
146
149
150
142
148
Foreleg Length
138
136
147
139
143
141
143
145
136
146
SECTION-C
16. Find out linear regression equation of y on x using following data of heights (in inches) of
fathers and their adult sons :
Adult son (y)
68
66
68
65
69
66
68
65
71
67
68
70
Father(x)
65
63
67
64
68
62
70
66
68
67
69
71
17. Using the following data, perform Mann-Whitney test to test the null hypothesis that
male and female turtles have the same mean cholesterol concentrations (mg/100ml) :
Male
244
248
236
232
251
245
254
256
Female
232
240
244
244
234
230
226
18. a) Describe ANOVA and discuss in which situation ANOVA test is applied.
b) Six samples of each of the five water bodies were analyzed for strontium
concentration in the water bodies and ANOVA test was performed. Based on
following information determine if the strontium concentration of five different water
bodies is same at 0.05 level of significance.
Total sum of squares = 2437.572 and Group sum of squares = 2193.442
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
2 | M-76945
(S2)- 316
This post was last modified on 26 June 2021